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pcb.h revision 1.19 
      1 /*	pcb.h,v 1.14.22.2 2007/11/06 23:15:05 matt Exp	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Matt Thomas <matt (at) 3am-software.com>.
      5  * Copyright (c) 1994 Mark Brinicombe.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the RiscBSD team.
     19  * 4. The name "RiscBSD" nor the name of the author may be used to
     20  *    endorse or promote products derived from this software without specific
     21  *    prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
     24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef	_ARM_PCB_H_
     37 #define	_ARM_PCB_H_
     38 
     39 #include <machine/frame.h>
     40 #include <machine/fp.h>
     41 
     42 #include <arm/arm32/pte.h>
     43 #include <arm/reg.h>
     44 
     45 struct trapframe;
     46 
     47 struct pcb_arm32 {
     48 	/*
     49 	 * WARNING!
     50 	 * cpuswitch.S relies on pcb32_r8 being quad-aligned in struct pcb
     51 	 * (due to the use of "strd" when compiled for XSCALE)
     52 	 */
     53 	u_int	pcb32_r8 __aligned(8);		/* used */
     54 	u_int	pcb32_r9;			/* used */
     55 	u_int	pcb32_r10;			/* used */
     56 	u_int	pcb32_r11;			/* used */
     57 	u_int	pcb32_r12;			/* used */
     58 	u_int	pcb32_sp;			/* used */
     59 	u_int	pcb32_lr;
     60 	u_int	pcb32_pc;
     61 
     62 	/*
     63 	 * ARMv6 has two user thread/process id registers which can hold
     64 	 * any 32bit quanttiies.
     65 	 */
     66 	u_int	pcb32_user_pid_rw;		/* p15, 0, Rd, c13, c0, 2 */
     67 	u_int	pcb32_user_pid_ro;		/* p15, 0, Rd, c13, c0, 3 */
     68 };
     69 #define	pcb_pagedir	pcb_un.un_32.pcb32_pagedir
     70 #define	pcb_pl1vec	pcb_un.un_32.pcb32_pl1vec
     71 #define	pcb_l1vec	pcb_un.un_32.pcb32_l1vec
     72 #define	pcb_dacr	pcb_un.un_32.pcb32_dacr
     73 #define	pcb_cstate	pcb_un.un_32.pcb32_cstate
     74 
     75 struct pcb_arm26 {
     76 	struct	switchframe *pcb26_sf;
     77 };
     78 #define	pcb_sf	pcb_un.un_26.pcb26_sf
     79 
     80 /*
     81  * WARNING!
     82  * See warning for struct pcb_arm32, above, before changing struct pcb!
     83  */
     84 struct pcb {
     85 	u_int	pcb_flags;
     86 #define	PCB_OWNFPU	0x00000001
     87 #define	PCB_NOALIGNFLT	0x00000002		/* For EXEC_AOUT */
     88 	struct	trapframe *pcb_tf;
     89 	void *	pcb_onfault;			/* On fault handler */
     90 	union	{
     91 		struct	pcb_arm32 un_32;
     92 		struct	pcb_arm26 un_26;
     93 	} pcb_un;
     94 	struct	fpe_sp_state pcb_fpstate;	/* FPA Floating Point state */
     95 	struct	vfpreg pcb_vfp;			/* VFP registers */
     96 	struct	cpu_info *pcb_vfpcpu;		/* CPU holding VFP state */
     97 };
     98 #define	pcb_ff	pcb_fpstate			/* for arm26 */
     99 
    100 /*
    101  * No additional data for core dumps.
    102  */
    103 struct md_coredump {
    104 	int	md_empty;
    105 };
    106 
    107 #ifdef _KERNEL
    108 #ifdef _KERNEL_OPT
    109 #include "opt_multiprocessor.h"
    110 #endif
    111 #ifdef MULTIPROCESSOR
    112 #define curpcb	(curcpu()->ci_curpcb)
    113 #else
    114 extern struct pcb *curpcb;
    115 #endif
    116 #endif	/* _KERNEL */
    117 
    118 #endif	/* _ARM_PCB_H_ */
    119